Primary Ewing Sarcoma of the First Rib Presenting as Superior Vena Cava Syndrome: Case Report of a Young Male.

Ewing sarcoma is a malignant tumor of young adults comprising about 10%-15% of all bone sarcomas. Commonly, the long bones are affected but it can also originate from the rib, pelvis and spine. We present a large Ewing sarcoma in a 16-year-male, arising from the first right rib and manifesting with superior vena cava syndrome.